Home / 80,820.40-121,230.60-21,665.20

Finding the Fourth Proportional to 80,820.40, 121,230.60 and 21,665.20

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Solution

The fourth proportional to 80,820.40, 121,230.60 and 21,665.20 is: 32,497.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,820.40 : 121,230.60 = 21,665.20 : x
  2. Step 2: Convert to fraction form
    80,820.40/121,230.60 = 21,665.20/x
  3. Step 3: Cross multiply
    80,820.40x = 121,230.60 × 21,665.20
  4. Step 4: Simplify right side
    80,820.40x = 2,626,485,195.12
  5. Step 5: Solve for x
    x = 2,626,485,195.12/80,820.40
  6. Step 6: Final answer
    x = 32,497.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.